journal
MENU ▼
Read by QxMD icon Read
search

Frontiers in Zoology

journal
https://www.readbyqxmd.com/read/28503187/worker-reproduction-of-the-invasive-yellow-crazy-ant-anoplolepis-gracilipes
#1
Ching-Chen Lee, Hirotaka Nakao, Shu-Ping Tseng, Hung-Wei Hsu, Gwo-Li Lin, Jia-Wei Tay, Johan Billen, Fuminori Ito, Chow-Yang Lee, Chung-Chi Lin, Chin-Cheng Scotty Yang
BACKGROUND: Reproductive division of labor is one of the key features of social insects. Queens are adapted for reproduction while workers are adapted for foraging and colony maintenance. In many species, however, workers retain functional ovaries and can lay unfertilized male eggs or trophic eggs. Here we report for the first time on the occurrence of physogastric workers and apparent worker reproduction in the invasive yellow crazy ant Anoplolepis gracilipes (Fr. Smith). We further examined the reproductive potential and nutritional role of physogastric workers through multidisciplinary approaches including morphological characterization, laboratory manipulation, genetic analysis and behavioral observation...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28491118/the-head-morphology-of-pyrrhosoma-nymphula-larvae-odonata-zygoptera-focusing-on-functional-aspects-of-the-mouthparts
#2
Sebastian Büsse, Thomas Hörnschemeyer, Stanislav N Gorb
BACKGROUND: The understanding of concerted movements and its underlying biomechanics is often complex and elusive. Functional principles and hypothetical functions of these complex movements can provide a solid basis for biomechanical experiments and modelling. Here a description of the cephalic anatomy of Pyrrhosoma nymphula (Zygoptera, Coenagrionidae) focusing on functional aspects of the mouthparts using micro computed tomography (μCT) is presented. RESULTS: We compared six different instars of the damselfly P...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28428805/edible-dormice-glis-glis-avoid-areas-with-a-high-density-of-their-preferred-food-plant-the-european-beech
#3
Jessica S Cornils, Franz Hoelzl, Birgit Rotter, Claudia Bieber, Thomas Ruf
BACKGROUND: Numerous species, especially among rodents, are strongly affected by the availability of pulsed resources. The intermittent production of large seed crops in northern hemisphere tree species (e.g., beech Fagus spec.,oak Quercus spec., pine trees Pinus spec.) are prime examples of these resource pulses. Adult edible dormice are highly dependent on high energy seeds to maximize their reproductive output. For juvenile dormice the energy rich food is important to grow and fatten in a very short time period prior to hibernation...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28428804/morphogenesis-of-honeybee-hypopharyngeal-gland-during-pupal-development
#4
Sascha Peter Klose, Daniel Rolke, Otto Baumann
BACKGROUND: The hypopharyngeal gland of worker bees contributes to the production of the royal jelly fed to queens and larvae. The gland consists of thousands of two-cell units that are composed of a secretory cell and a duct cell and that are arranged in sets of about 12 around a long collecting duct. RESULTS: By fluorescent staining, we have examined the morphogenesis of the hypopharyngeal gland during pupal life, from a saccule lined by a pseudostratified epithelium to the elaborate organ of adult worker bees...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28416963/mitochondrial-acclimation-potential-to-ocean-acidification-and-warming-of-polar-cod-boreogadus-saida-and-atlantic-cod-gadus-morhua
#5
Elettra Leo, Kristina L Kunz, Matthias Schmidt, Daniela Storch, Hans-O Pörtner, Felix C Mark
BACKGROUND: Ocean acidification and warming are happening fast in the Arctic but little is known about the effects of ocean acidification and warming on the physiological performance and survival of Arctic fish. RESULTS: In this study we investigated the metabolic background of performance through analyses of cardiac mitochondrial function in response to control and elevated water temperatures and PCO2 of two gadoid fish species, Polar cod (Boreogadus saida), an endemic Arctic species, and Atlantic cod (Gadus morhua), which is a temperate to cold eurytherm and currently expanding into Arctic waters in the wake of ocean warming...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28413431/asian-house-rats-may-facilitate-their-invasive-success-through-suppressing-brown-rats-in-chronic-interaction
#6
Hong-Ling Guo, Hua-Jing Teng, Jin-Hua Zhang, Jian-Xu Zhang, Yao-Hua Zhang
BACKGROUND: The Asian house rat (Rattus tanezumi) and the brown rat (Rattus norvegicus) are closely related species and are partially sympatric in southern China. Over the past 20 years, R. tanezumi has significantly expanded northward in China and partially replaced the native brown rat subspecies, R. n. humiliatus. Although invasive species are often more aggressive than native species, we did not observe interspecific physical aggression between R. tanezumi and R. n. humiliatus. Here, we focused on whether or not R...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28344631/a-behavioural-syndrome-but-less-evidence-for-a-relationship-with-cognitive-traits-in-a-spatial-orientation-context
#7
Andrea C Schuster, Uwe Zimmermann, Carina Hauer, Katharina Foerster
BACKGROUND: Animals show consistent individual behavioural differences in many species. Further, behavioural traits (personality traits) form behavioural syndromes, characterised by correlations between different behaviours. Mechanisms maintaining these correlations could be constrained due to underlying relationships with cognitive traits. There is growing evidence for the non-independence of animal personality and general cognitive abilities in animals, but so far, studies on the direction of the relationship between them revealed contradictory results...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28344630/flexible-reaction-norms-to-environmental-variables-along-the-migration-route-and-the-significance-of-stopover-duration-for-total-speed-of-migration-in-a-songbird-migrant
#8
Heiko Schmaljohann, Simeon Lisovski, Franz Bairlein
BACKGROUND: Predicting the consequences of continuing anthropogenic changes in the environment for migratory behaviours such as phenology remains a major challenge. Predictions remain particularly difficult, because our knowledge is based on studies from single-snapshot observations at specific stopover sites along birds' migration routes. However, a general understanding on how birds react to prevailing environmental conditions, e.g. their 'phenotypic reaction norm', throughout the annual cycle and along their entire migration routes is required to fully understand how migratory birds respond to rapid environmental change...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28331531/an-integrative-systematic-framework-helps-to-reconstruct-skeletal-evolution-of-glass-sponges-porifera-hexactinellida
#9
Martin Dohrmann, Christopher Kelley, Michelle Kelly, Andrzej Pisera, John N A Hooper, Henry M Reiswig
BACKGROUND: Glass sponges (Class Hexactinellida) are important components of deep-sea ecosystems and are of interest from geological and materials science perspectives. The reconstruction of their phylogeny with molecular data has only recently begun and shows a better agreement with morphology-based systematics than is typical for other sponge groups, likely because of a greater number of informative morphological characters. However, inconsistencies remain that have far-reaching implications for hypotheses about the evolution of their major skeletal construction types (body plans)...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28270855/sequential-social-experiences-interact-to-modulate-aggression-but-not-brain-gene-expression-in-the-honey-bee-apis-mellifera
#10
Clare C Rittschof
BACKGROUND: In highly structured societies, individuals behave flexibly and cooperatively in order to achieve a particular group-level outcome. However, even in social species, environmental inputs can have long lasting effects on individual behavior, and variable experiences can even result in consistent individual differences and constrained behavioral flexibility. Despite the fact that such constraints on behavior could have implications for behavioral optimization at the social group level, few studies have explored how social experiences accumulate over time, and the mechanistic basis of these effects...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28265294/the-bare-head-of-the-northern-bald-ibis-geronticus-eremita-fulfills-a-thermoregulatory-function
#11
REVIEW
Ismael Galván, Daniel Palacios, Juan José Negro
BACKGROUND: Dark pigments provide animals with several adaptive benefits such as protection against ultraviolet (UV) radiation and mechanical abrasion, but may also impose several constraints like a high absorbance of solar radiation. Endotherms, with relatively constant and high body temperatures, may be especially prone to thermoregulatory limitations if dark coloured and inhabiting hot environments. It is therefore expected that adaptations have specifically evolved because of these limitations...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28261313/optic-nerve-transmitted-eyeshine-a-new-type-of-light-emission-from-fish-eyes
#12
Roland Fritsch, Jeremy F P Ullmann, Pierre-Paul Bitton, Shaun P Collin, Nico K Michiels
BACKGROUND: Most animal eyes feature an opaque pigmented eyecup to assure that light can enter from one direction only. We challenge this dogma by describing a previously unknown form of eyeshine resulting from light that enters the eye through the top of the head and optic nerve, eventually emanating through the pupil as a narrow beam: the Optic-Nerve-Transmitted (ONT) eyeshine. We characterize ONT eyeshine in the triplefin blenny Tripterygion delaisi (Tripterygiidae) in comparison to three other teleost species, using behavioural and anatomical observations, spectrophotometry, histology, and magnetic resonance imaging...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28250800/vocal-exchanges-during-pair-formation-and-maintenance-in-the-zebra-finch-taeniopygia-guttata
#13
Pietro Bruno D'Amelio, Lisa Trost, Andries Ter Maat
BACKGROUND: Pair compatibility affects the success of a pair; however, its causes and mechanisms are not fully understood. Vocal exchange may be very important for pair formation, coordinating pair activities, maintaining the pair bond and mate guarding. To investigate the role of vocal exchange in pair formation and pair maintenance, we explored whether new and established pairs of zebra finches differed in their calling relationships. We used individualised backpack microphones to examine the entire daily vocal emission of pairs, with parallel video recording of behaviour...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28250799/inhibition-of-cell-proliferation-does-not-slow-down-echinoderm-neural-regeneration
#14
Vladimir S Mashanov, Olga R Zueva, José E García-Arrarás
BACKGROUND: Regeneration of the damaged central nervous system is one of the most interesting post-embryonic developmental phenomena. Two distinct cellular events have been implicated in supplying regenerative neurogenesis with cellular material - generation of new cells through cell proliferation and recruitment of already existing cells through cell migration. The relative contribution and importance of these two mechanisms is often unknown. METHODS: Here, we use the regenerating radial nerve cord (RNC) of the echinoderm Holothuria glaberrima as a model of extensive post-traumatic neurogenesis in the deuterostome central nervous system...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28250798/reproductiveaxis-gene-regulation-during-photostimulation-and-photorefractoriness-in-yangzhou-goose-ganders
#15
Huanxi Zhu, Zhe Chen, Xibin Shao, Jianning Yu, Chuankun Wei, Zichun Dai, Zhendan Shi
BACKGROUND: The Yangzhou goose is a long-day breeding bird that has been increasingly produced in China. Artificial lighting programs are used for controlling its reproductive activities. This study investigated the regulations of photostimulation and photorefractoriness that govern the onset and cessation of the breeding period. RESULTS: Increasing the daily photoperiod from 8 to 12 h rapidly stimulated testis development and increased plasma testosterone concentrations, with peak levels being reached 2 months after the photoperiod increase...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28239401/group-or-ungroup-moose-behavioural-response-to-recolonization-of-wolves
#16
Johan Månsson, Marie-Caroline Prima, Kerry L Nicholson, Camilla Wikenros, Håkan Sand
BACKGROUND: Predation risk is a primary motivator for prey to congregate in larger groups. A large group can be beneficial to detect predators, share predation risk among individuals and cause confusion for an attacking predator. However, forming large groups also has disadvantages like higher detection and attack rates of predators or interspecific competition. With the current recolonization of wolves (Canis lupus) in Scandinavia, we studied whether moose (Alces alces) respond by changing grouping behaviour as an anti-predatory strategy and that this change should be related to the duration of wolf presence within the local moose population...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28239400/mate-choice-for-major-histocompatibility-complex-complementarity-in-a-strictly-monogamous-bird-the-grey-partridge-perdix-perdix
#17
Dana Rymešová, Tereza Králová, Marta Promerová, Josef Bryja, Oldřich Tomášek, Jana Svobodová, Petr Šmilauer, Miroslav Šálek, Tomáš Albrecht
BACKGROUND: Sexual selection has been hypothesised as favouring mate choice resulting in production of viable offspring with genotypes providing high pathogen resistance. Specific pathogen recognition is mediated by genes of the major histocompatibility complex (MHC) encoding proteins fundamental for adaptive immune response in jawed vertebrates. MHC genes may also play a role in odour-based individual recognition and mate choice, aimed at avoiding inbreeding. MHC genes are known to be involved in mate choice in a number of species, with 'good genes' (absolute criteria) and 'complementary genes' (self-referential criteria) being used to explain MHC-based mating...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28203263/perception-of-emotional-valence-in-horse-whinnies
#18
Elodie F Briefer, Roi Mandel, Anne-Laure Maigrot, Sabrina Briefer Freymond, Iris Bachmann, Edna Hillmann
BACKGROUND: Non-human animals often produce different types of vocalisations in negative and positive contexts (i.e. different valence), similar to humans, in which crying is associated with negative emotions and laughter is associated with positive ones. However, some types of vocalisations (e.g. contact calls, human speech) can be produced in both negative and positive contexts, and changes in valence are only accompanied by slight structural differences. Although such acoustically graded signals associated with opposite valence have been highlighted in some species, it is not known if conspecifics discriminate them, and if contagion of emotional valence occurs as a result...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28194219/development-of-a-lecithotrophic-pilidium-larva-illustrates-convergent-evolution-of-trochophore-like-morphology
#19
Marie K Hunt, Svetlana A Maslakova
BACKGROUND: The pilidium larva is an idiosyncrasy defining one clade of marine invertebrates, the Pilidiophora (Nemertea, Spiralia). Uniquely, in pilidial development, the juvenile worm forms from a series of isolated rudiments called imaginal discs, then erupts through and devours the larval body during catastrophic metamorphosis. A typical pilidium is planktotrophic and looks like a hat with earflaps, but pilidial diversity is much broader and includes several types of non-feeding pilidia...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28191025/from-egg-to-no-body-an-overview-and-revision-of-developmental-pathways-in-the-ancient-arthropod-lineage-pycnogonida
#20
REVIEW
Georg Brenneis, Ekaterina V Bogomolova, Claudia P Arango, Franz Krapp
BACKGROUND: Arthropod diversity is unparalleled in the animal kingdom. The study of ontogeny is pivotal to understand which developmental processes underlie the incredible morphological disparity of arthropods and thus to eventually unravel evolutionary transformations leading to their success. Work on laboratory model organisms has yielded in-depth data on numerous developmental mechanisms in arthropods. Yet, although the range of studied taxa has increased noticeably since the advent of comparative evolutionary developmental biology (evo-devo), several smaller groups remain understudied...
2017: Frontiers in Zoology
journal
journal
40831
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"